Figure 1From: Evolution of mal ABC transporter operons in the Thermococcales and ThermotogalesThe evolutionary history of the mal genes in the Thermococcales. mal E/mdx E encode the substrate binding proteins (SBPs), mal F/mdx F and mal G/mdx G encode membrane spanning proteins (MSPs) also known as permease subunits, and mal K/mdx K encode ATP binding proteins (ABP) containing an ATP binding cassette (ABC). Subscript An denotes ancestral genes.Back to article page